Merge "Move network activity change processing to handler thread" am: df9a2d7e20 am: b3f309ca24 am: 557fbbdf90 am: 2affe13aa3

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2606673

Change-Id: I76362dc041b66b248b11027ca84732c6c6e097db
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>